47 lines
1.4 KiB
Elixir
47 lines
1.4 KiB
Elixir
defmodule IbanEx.Parser do
|
|
@moduledoc false
|
|
|
|
alias IbanEx.{Country, Iban, Validator}
|
|
import IbanEx.Commons, only: [normalize_and_slice: 2]
|
|
|
|
@type iban_string() :: String.t()
|
|
@type country_code_string() :: <<_::16>>
|
|
@type check_digits_string() :: <<_::16>>
|
|
@type iban_or_error() :: IbanEx.Iban.t() | {:error, atom()}
|
|
|
|
@spec parse({:ok, String.t()} | String.t()) :: iban_or_error()
|
|
def parse({:ok, iban_string}), do: parse(iban_string)
|
|
|
|
def parse(iban_string) do
|
|
case Validator.validate(iban_string) do
|
|
{:ok, valid_iban} ->
|
|
iban_map = %{
|
|
country_code: country_code(valid_iban),
|
|
check_digits: check_digits(valid_iban)
|
|
}
|
|
|
|
regex = Country.country_module(iban_map.country_code).rule()
|
|
bban = bban(iban_string)
|
|
|
|
bban_map =
|
|
for {key, val} <- Regex.named_captures(regex, bban),
|
|
into: %{},
|
|
do: {String.to_atom(key), val}
|
|
|
|
{:ok, struct(Iban, Map.merge(iban_map, bban_map))}
|
|
|
|
{:error, error_type} ->
|
|
{:error, error_type}
|
|
end
|
|
end
|
|
|
|
@spec country_code(iban_string()) :: country_code_string()
|
|
def country_code(iban_string), do: normalize_and_slice(iban_string, 0..1)
|
|
|
|
@spec check_digits(binary()) :: check_digits_string()
|
|
def check_digits(iban_string), do: normalize_and_slice(iban_string, 2..3)
|
|
|
|
@spec bban(binary()) :: binary()
|
|
def bban(iban_string), do: normalize_and_slice(iban_string, 4..-1//1)
|
|
end
|